CN87203461U

CN87203461U - Single pendulum oscillation traces demonstrator

Info

Publication number: CN87203461U
Application number: CN 87203461
Authority: CN
Inventors: 高殿琪; 金成川
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-16
Filing date: 1987-07-16
Publication date: 1988-04-20

Abstract

The utility model discloses a single pendulum oscillation traces demonstrator, composed of a bottom board, a movable support, a hanger bracket of a pendulum, a supercharger, a reel, a micro-motor and a speed reducing device. The utility model, suitable for the teaching in the physics class in high school, makes the vibration of the pendulum relate to the sine (cosine) curve and describes the sine (cosine) curve of the undamped vibration. The utility model has the advantages of simple structure, low cost, convenient operation, convenience for carrying, easy collecting material, being collapsible, large visibility if projected by a projector and clear curve forming process. The single pendulum oscillation traces demonstrator not only can be operated by motor but also can be operated by hand, so the single pendulum oscillation traces demonstrator is an ideal teaching appliance.

Description

Single pendulum oscillation traces demonstrator

The utility model has related to a kind of physics educational apparatus, is a kind of simple pendulum oscillation figure line apparatus for demonstrating.

Vibrational diagram is the main tool of research vibration regularity, all is widely used in mechanical vibration, alternating current and electromagnetic oscillation.The simple harmonic oscillation image of high school physics textbook (edition B) first volume introduction is to depict image by the swing and the movable base plate of sand pendulum.Adopt the experiment of sand pendulum to be difficult for the image that the sand grains on the viewing plane forms; Pull base plate and be difficult for accomplishing uniform motion, therefore can not draw comparatively ideal figure line; Can not describe the curve process to sand pendulum and see clearly, can not connect the vibration of pendulum and (surplus) chord curve just.

The purpose of this utility model is to provide a kind of simple in structure, easy to use, cost is low, drop shadow effect is good simple pendulum oscillation figure line apparatus for demonstrating.

The utility model is achieved in that it is made up of base plate, travel(l)ing rest, pendulum suspension, the balance-type type edge of a knife, balance-type type cutter groove, pendulum, supercharger, spool, micromotor and reduction gear.Glass window is arranged on the base plate, the travel(l)ing rest that the useful screw of an end of base plate connects, there is the tray that is screwed the center of travel(l)ing rest upper end, and balance-type type cutter groove is bonded on the tray; The pendulum suspension that a band balance-type type edge of a knife is arranged on balance-type type cutter groove, the balance-type type edge of a knife places on the balance-type type cutter groove, and pendulum suspension one side has an inclined hole, and inclined hole is communicated with the pendulum of hollow with a tubule, there is a kapillary pendulum lower end, in a side of base plate supercharger is installed.Being communicated with tubule between the inclined hole on supercharger outlet and the pendulum suspension, is power with the direct supply when supercharger adopts electric operating, by micromotor, reduction gear, have the travel switch control supercharger of banking stop.Supercharger also can directly adopt manual operation; At the two ends of base plate an active spool and a passive spool that connects with fixed mount is arranged respectively, a stationary shaft of pressing transparent membrane to use is arranged under the spool, curl transparent membrane on the spool.When adopting electric operating, spool is power with the direct current, drives its rotation by micromotor, reduction gear, regulates the spool velocity of rotation with potentiometer.

Be described further below in conjunction with accompanying drawing:

Fig. 1 is the front view of a kind of concrete structure of the utility model.

Fig. 2 is the vertical view of a kind of concrete structure of the utility model.

Fig. 3 is the cut-open view of Fig. 1 along A-A.

Fig. 4 is a kind of easy structure front view of the present utility model.

Fig. 5 is the electrical schematic diagram of Fig. 1.

Fig. 6 is the electrical schematic diagram of Fig. 4.

Describe concrete structure of the present utility model and operating process in detail with reference to Fig. 1～6.Referring to Fig. 1～3, glass window 18 is arranged for projection usefulness on the base plate 12, the travel(l)ing rest 3 that the useful screw of an end of base plate 12 connects, travel(l)ing rest 3 can fold.There is the tray 1 that is stained with balance-type type cutter groove 17 that is screwed the center of travel(l)ing rest 3 upper ends; The pendulum suspension 2 that a band balance-type type edge of a knife 21 is arranged on balance-type type cutter groove 17, the balance-type type edge of a knife 21 places on the balance-type type cutter groove 17, pendulum suspension 2 one sides have an inclined hole, inclined hole is communicated with dress crayon water in the pendulum with a tubule with the pendulum 5 of hollow, there is a kapillary pendulum 5 lower ends, and kapillary can replace with syringe needle.Pendulum 5 can freely swing.Side at base plate 12 is installed supercharger 7, and supercharger 7 can replace with injector for medical purpose, is communicated with tubule 4 between the inclined hole on supercharger 7 outlets and the pendulum suspension 2.Supercharger 7 can be used electrically operated, and micromotor and reduction gear 10 are installed on base plate 12, and the output terminal of reduction gear 10 is connected on the piston of supercharger 7 by leading screw, nut 9, with the travel switch 8 control supercharger operations that have banking stop.An active spool 19 and a passive spool 15 that connects with fixed mount is arranged at the two ends of base plate 12, spool respectively has a stationary shaft of pressing transparent membrane for 15,19 times, curl transparent membrane on the

spool

15,19, initiatively spool 19 is a power with the direct current, drive its rotation by micromotor and reduction gear 14, regulate the spool velocity of rotation with potentiometer 13.The speed reduction unit that speed reduction unit 10 adopts in the Inertia toy automobile.

Power supply, micromotor and the reduction gear 10, nut 9, the disconnecting link switch 6 that drive supercharger 7 are removed, promptly constituted a kind of simple form of the present utility model with manual operation supercharger 7.

With K switch ₁Connect micromotor D to the right ₁Just change, so drive the film uniform motion; K switch ₁Connect micromotor D left ₁Reversing can be return film.Regulator potentiometer W can change the movement velocity of film, turns clockwise, and movement velocity accelerates, otherwise then slack-off.With K switch ₂Connect micromotor D left ₂Just change, flow out by the kapillary of the crayon water in reduction gear promotion supercharger, the pendulum, so that on film, draw curve by the pendulum lower end.Connect K switch to the right ₂Micromotor D ₂Counter-rotating can be return supercharger 7, prevents that crayon water from continuing to flow out.Supercharger 7 is by travel switch K ₃The control stroke.

Handle assembly is placed on above the large projector before the experiment, with the kapillary of filament break-through pendulum 5 lower ends, so that crayon water can be smooth without hindrance.Travel(l)ing rest 3 is upright, make it vertical with base plate 12, screw screw.The pendulum lid of band sealing gasket is outwarded winding, poured into crayon water, screw the pendulum lid.Put down one section transparent membrane from axle, with the resistance that reduces to move.Make pendulum 5 along the swing of vertical thin-film direction of motion, the amplitude of oscillation is less than thin-film width, and the drift angle is less than 5 °.Connect K switch then left ₂, atmospheric pressure increases in the pendulum 5, and crayon water flows out, behind article one line of ink marker for the treatment of to draw on the film, the demand working K switch ₁, make the film uniform motion, so (surplus) chord curve that just just on film, drawing.

Use the figure line apparatus for demonstrating of easy structure, because this structure drives supercharger without micromotor and reduction gear 10 travel switches 8, nut 9, only with hand promotes supercharger 7 increases pendulum 5 pressure, and crayon water flows out from kapillary, just is being depicted as (surplus) chord curve.

The curve negotiating projector of drawing with clear image project on the screen or on the blackboard, drop shadow effect is good.The straight line of equilibrium position then can draw on blackboard.Coordinate axis etc. are to explain the knowledge of relevant vibration figure line.

The utility model can connect the vibration of pendulum and (surplus) chord curve just, can depict just (surplus) chord curve of continuous vibration, and has and draw materials easily, and simple structure, cost be low, easy to use, collapsible, be easy to carry. Process big with projecting apparatus projection visibility, forming curves is clear. The plastic sheeting movement velocity can be regulated, booster can be electronic or manual etc. advantage. This device is highly suitable for physics teaching in secondary school and uses.

1 is tray among the figure, 2 are pendulum cone suspension, 3 is travel(l)ing rest, 4 is tubule, 5 is pendulum, 6 is chopper switch, 7 is booster, 8 is travel switch, 9 is nut, leading screw, 10 is the micro machine deceleration device, 11 is chopper switch, 12 is base plate, 13 is potentiometer, 14 is micro machine and deceleration device, 15 is passive spool, 16 is scroll support, 17 is balance-type type cutter groove, 18 is glass window, 19 is the active spool, 20 is scroll support, 21 is the balance edge of a knife, 22 is plastic sheeting.

Claims

1, a kind of single oscillation figure line apparatus for demonstrating that shakes, comprise base plate, support, pendulum, it is characterized in that: glass window 18 is arranged on the base plate 12, the travel(l)ing rest 3 that the useful screw of an end of base plate 12 is fixing, the centre bit of travel(l)ing rest 3 upper ends is equipped with a tray 1 that is stained with balance-type type cutter groove 17; On balance-type type cutter groove 17, place the pendulum suspension 2 of a band balance-type type edge of a knife 21, one inclined hole is arranged on the pendulum suspension 2, inclined hole is communicated with the pendulum 5 of hollow with tubule, there is a kapillary pendulum 5 lower ends, in base plate 12 1 sides a supercharger 7 is installed, be communicated with tubule 4 between the inclined hole on its outlet and the pendulum suspension 2, supercharger 7 is that power drives by micromotor and reduction gear 10, leading screw, nut 9, travel switch 8 with the direct current.Initiatively a spool 19 and a passive spool 15 are respectively arranged at base plate 12 two ends, curl transparent membrane on the spool 19,15, initiatively spool 19 is a power with the direct supply, drives initiatively spools 19 rotations, 13 speed governing of spool 19 usefulness potentiometers by micromotor and reduction gear 14.

2, simple pendulum oscillation figure line apparatus for demonstrating according to claim 1 is characterized in that described supercharger 7 can be manual.